CPU - the part of a computer that controls all the other parts, chip - a very small piece of semiconductor, especially in a computer, that contains extremely small electronic circuits and devices, and can perform particular operations, integrated circuit - a very small electronic circuit that consists of a lot of small parts made on a piece of semiconducting material, RAM - a type of computer memory that can be searched in any order and changed as necessary, ROM - a type of computer memory that holds information that can be used but not changed or added to, motherboard - the main printed circuit board that contains the CPU of a computer and makes it possible for the other parts of a computer to communicate with each other, BIOS - a computer's basic firmware (= a set of programs that form part of a computer) that operates every time it starts up, bus - a set of wires in a computer along which information can be sent to and from other parts of the computer, expansion slot - a place in a computer circuit where an expansion card can be added, speed - how fast something moves, optical disk drive - part of a computer, CD player, or other piece of equipment that can read optical discs using a laser, hard disk - a device that is fixed inside a computer and is used to store programs and information, system clock - a continuous pulse that helps the computer clock keep the correct time, peripherals - a piece of equipment, such as a printer, that can be connected to a computer, expansion card - a board covered with small metal electrical connections that create one or more circuits and that can be connected to the main circuit board of a computer so that it can do more things, ALU - a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers,

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